keeping track of time spent on projects + project tracking

[md_doc]

do you guys use any software online/offline to keep track of how much time you spend on each project you're working on?

Basically I need something that allows me to note down things like "3 hours on the project xyz"
I know it could be done with pen and paper but I'd prefer to have everything on the pc or online

and regarding project management: does someone use sidejobtrack.com? or anything similar?

it looks like a nice tool